Pastikan anda telah membuat Proyek Flutter
1. Struktur Folder
2. Code main,
import 'package:bionotes/pages/splash_screen.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'controller/home_controller.dart';
import 'pages/input_page.dart';
import 'pages/result_page.dart';
void main() {
Get.put(HomeController());
runApp(GetMaterialApp(
debugShowCheckedModeBanner: false,
initialRoute: '/',
getPages: [
GetPage(name: '/', page: ()=> SplashSceen()),
GetPage(name: '/input', page: ()=> InputPage()),
GetPage(name: '/result', page: () => ResultPage()),
],
));
}
3. Code di dalam folder Controller
beri nama home_controller.dart
import 'package:get/get.dart';
class HomeController extends GetxController {
RxDouble weight = 0.0.obs;
RxDouble height = 0.0.obs;
RxDouble bmi = 0.0.obs;
void setWeight(double value) {
weight.value = value;
}
void setHeight(double value) {
height.value = value;
}
void calculateBMI() {
double heightInMeters = height.value / 100.0;
bmi.value = weight.value / (heightInMeters * heightInMeters);
}
}
class HomeBinding implements Bindings {
@override
void dependencies() {
Get.lazyPut<HomeController>(() => HomeController());
}
}
4. Code di dalam folder pages :
input_page.dart
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import '../controller/home_controller.dart';
class InputPage extends StatelessWidget {
final HomeController controller = Get.find<HomeController>();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('BMI Calculator'),
),
body: Container(
padding: EdgeInsets.all(16.0),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
TextField(
keyboardType: TextInputType.number,
decoration: InputDecoration(labelText: 'Berat (kg)'),
onChanged: (value) => controller.setWeight(double.parse(value)),
),
SizedBox(height: 16.0),
TextField(
keyboardType: TextInputType.number,
decoration: InputDecoration(labelText: 'Tinggi (cm)'),
onChanged: (value) => controller.setHeight(double.parse(value)),
),
SizedBox(height: 16.0),
ElevatedButton(
onPressed: () {
controller.calculateBMI();
Get.toNamed('/result');
},
child: Text('Hitung BMI'),
),
],
),
),
);
}
}
result_page.dart
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import '../controller/home_controller.dart';
class ResultPage extends StatelessWidget {
final HomeController controller = Get.find();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Hasil BMI'),
),
body: Container(
padding: EdgeInsets.all(16.0),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
'BMI Anda:',
style: TextStyle(fontSize: 24.0, fontWeight: FontWeight.bold),
),
SizedBox(height: 16.0),
Obx(() => Text(
'${controller.bmi.value.toStringAsFixed(2)}',
style: TextStyle(fontSize: 48.0, fontWeight: FontWeight.bold),
)),
],
),
),
);
}
}
splash_screen.dart
import 'package:bionotes/pages/input_page.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
class SplashSceen extends StatefulWidget {
@override
_SplashScreenState createState() => _SplashScreenState();
}
class _SplashScreenState extends State<SplashSceen> {
@override
void initState() {
super.initState();
navigateToNextScreen();
}
void navigateToNextScreen() async {
await Future.delayed(Duration(seconds: 2)); //Menunggu 2 detik
Get.off(() =>
InputPage()); //pindah ke input page dan menghapus splashcreen dari tumpukan navigasi
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Text("Splaschcreen")
),
);
}
}
 dengan flutter 3.10.3 terbaru 2023){kind=link}